Order of Operations by 0wX83Ug

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									 1-4 Order of Operations
  1-4 Order of Operations




                Warm Up
                Problem of the Day
                Lesson Presentation




 Course
Course 1 1
 1-4 Order of Operations


    Warm Up
    Perform the operations in order from
    left to right.
    1.     8+4–2        10
    2.     93+1        28
    3.     7–3+5        9
    4.     20 ÷ 4 + 6   11



Course 1
 1-4 Order of Operations


       Problem of the Day
       0123456789=1
       Put the appropriate plus or minus signs
       between the numbers so that the total
       equals 1.
             0 + 1 – 23 + 45 + 67 – 89 = 1




Course 1
 1-4 Order of Operations




   Learn to use the order of operations.




Course 1
 1-4 Order of Operations

                    Vocabulary
           numerical expressions
           evaluate
           order of operations




Course 1
 1-4 Order of Operations


     A numerical expression is a mathematical
     phrase that includes only numbers and operation
     symbols.

 Numerical
 Expressions
             4+8÷2        6 371 – 203 + 2 5,006  19

     When you evaluate a numerical expression, you
     find its value.




Course 1
 1-4 Order of Operations

     When an expression has more than one
     operation, you must know which operation to do
     first. To make sure that everyone gets the same
     answer, we use the order of operations.

              ORDER OF OPERATIONS
     1. Perform operations in parentheses.
     2. Find the values of numbers with exponents.
     3. Multiply or divide from left to right as
     ordered in the problem.
     4. Add or subtract from left to right as ordered
     in the problem.

Course 1
 1-4 Order of Operations

           Order of Operations (Hop Scotch)

                            Parenthesis
                               ( )


                              Exponents


                                                 Whichever comes
                 Mulitplication                  first when you
                       •                         read left to right

                                                 Whichever comes
                   Addition        Subtraction
                                                 first when you
                      +                 -
                                                 read left to right


Course 1
 1-4 Order of Operations

           Additional Example 1A: Using the Order of
                         Operations
Evaluate the expression.
       15 – 10 ÷ 2

       15 – 10 ÷ 2         There are no parentheses or
                           exponents.
           15 –        5   Divide.

                  10       Subtract.




Course 1
 1-4 Order of Operations

           Additional Example 1B: Using the Order of
                         Operations
    Evaluate the expression.

       9 + (21 ÷ 7)  5
           9 + (21 ÷ 7)  5
                              Perform operations within
           9+     3    5     parentheses.

           9+         15      Multiply.

            24                Add.


Course 1
 1-4 Order of Operations
                   Check It Out: Example 1A
    Evaluate the expression.
       12 – 6 ÷ 2
                        There are no parentheses or
       12 – 6 ÷ 2
                        exponents.

       12 –    3        Divide.

           9            Subtract.




Course 1
 1-4 Order of Operations
                    Check It Out: Example 1B
    Evaluate the expression.

           7 + (24 ÷ 6)  3

           7 + (24 ÷ 6)  3
                              Perform operations within
           7+43
                              parentheses.

           7 + 12             Multiply.

            19                Add.



Course 1
 1-4 Order of Operations
           Additional Example 2A: Using the Order of
                  Operations with Exponents
    Evaluate the expression.

    24 + 6  4

    2 +64
      4
                        There are no parentheses.

    16 + 6  4          Find the value of the number
                        with the exponent.
    16 + 24             Multiply.

           40           Add.


Course 1
 1-4 Order of Operations

                     Check It Out: Example 2A
    Evaluate the expression.

           42 + 3  7

           42 + 3  7     There are no parentheses.

           16 + 3  7     Find the value of the number
                          with the exponent.
           16 + 21        Multiply.

             37           Add.


Course 1
 1-4 Order of Operations
                        Lesson Quiz


                    23
    Evaluate each expression.
    1. 15 + 4  2   39

    2. (12 – 5)2 – 10   16

    3. 3 + 9  2 – 5    49

    4. 43 – 30 ÷ 2




Course 1

								
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